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Employment Benefits - Summary of Remeasurement Components Recognized in Other Comprehensive Income (loss) (Details) - KRW (₩)
₩ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Changes in net defined benefit liability (asset) resulting from gain (loss) on remeasurement in other comprehensive income [abstract]    
Actuarial gain from changes in financial assumptions ₩ (967,366) ₩ (258,194)
Experience adjustments (45,361) (87,561)
Expected return 11,609 8,457
Total loss (gain) on remeasurement, net defined benefit liability (asset) ₩ (1,001,118) ₩ (337,298)